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I just wish someone would have said to me, "You're doing it wrong dummy. Don't use HDR output (even though it is totally counter intuitive) and use anti ghost." It works really well now.

Problem was what we all like to call PEBKAC = problem exists between keyboard and chair.
by mattmerk
Tue Mar 26, 2013 11:44 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Here are some more interesting HDRI images one could use for computer based lighting (also made by a friend). http://www.ruffstuffcg.com All have values above 1. Here's why. When shooting your HDR brackets, you want your middle most bracket to be in the ballpark of what would be seen by the human ey...
by mattmerk
Tue Mar 26, 2013 11:22 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Yeah, the Debevec work is old Klaus. I know that because I was reading it as he was publishing it while I was working on Star Trek. That is my whole point. Debevec developed something in the 90s and then people started mis-using the terminology he came up with. And If you read his papers and underst...
by mattmerk
Tue Mar 26, 2013 9:53 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

So, I have been talking to Alexandre who walked me through the proper procedure to get APG to do what I want. Here are my results: Here I go: 1. Loaded two copies of the same 32 bit .hdr file from the CGCookie website with values well above 1 in the highlights. 2. Made sure I am using the latest ver...
by mattmerk
Tue Mar 26, 2013 9:27 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

I used to be a beta tester for VRAY and was on the advisory board for 3DS Max at Autodesk who have invited me to speak at SIGGRAPH for many years. I know all this software back and forth. If you are using float images with no values above 1 and they were shot in outdoor environments under direct sun...
by mattmerk
Tue Mar 26, 2013 8:57 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Why you want to go over 1.0 is covered extensively in Debevec's papers published on the subject.

You could start here: http://www.pauldebevec.com/Research/HDR/
by mattmerk
Tue Mar 26, 2013 7:33 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

And for the record, making this one small fix to APG, based on what everyone is saying here, no one would even notice the change. Only Klaus, suddenly seeing very different (and better) results in his 3D renders, and all the people in the VFX world to whom I would be promoting the software. I'm basi...
by mattmerk
Tue Mar 26, 2013 6:33 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Well, first off, just loading the photomatix website, they are calling the picture of the eiffel tower HDRI. It isn't. Heres a quote from the site: "Photomatix Pro is an excellent tool for creating high dynamic range photographs." Stuart Gripman, Mac Life, issue # 17, 2008 That quote shows the misun...
by mattmerk
Tue Mar 26, 2013 6:26 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

ok, you did post a link to Blenders free HDI 32bit Floating Point panos. download one - open it in your HDI Software showing the Pipette pointing to a Point with value above 1. use the downloaded one and load this .exr file into autopano TWICE, disable all Options like Color correction etc before d...
by mattmerk
Tue Mar 26, 2013 1:12 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Where you would be without my wisdom is living with the assumption that the claims made on the APG website are actually correct. "...it is not so much relevant whether any pixel gets a value above 1 or not, it is about the number of steps between 0 and 1..." No. You need values above 1.0 in float to...
by mattmerk
Tue Mar 26, 2013 12:36 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Oh, and one more thing. I too assume the software isn't lying to me, just like you. "And when they accept the files as 32bit fp i believe them." The problem is that the files are actually 32 bit float. They just have their brightest values clamped at 1. I have assumed all along that APG was doing wh...
by mattmerk
Mon Mar 25, 2013 11:04 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

There is no argument here. Autopano Giga simply does not do what the ads claim and what I paid for. This isn't an ego competition. I have already said many, many, many times that I could be the stupid one here and would happily be wrong and shout out to the world how I couldn't figure out a simple p...
by mattmerk
Mon Mar 25, 2013 10:59 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Here are some actual HDR images suitable for CGI image based lighting. All have RGB values above 1. All contain the high dynamic range of the environments in which they were shot.

http://cgcookie.com/blender/2013/03/04/contribution-free-hdr-panoramas-resource/
by mattmerk
Mon Mar 25, 2013 10:53 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Not a dumb question at all. You can't see the RGB values in APG. You have to load them in software that can first, read 32 bit float images. Then, second, has a color picker that will show you the floating point RGB values. Another way to confirm it would be to load the image in Photoshop and just b...
by mattmerk
Mon Mar 25, 2013 10:31 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

By the way, I would prefer bringing in pre HDR-processed bracketed images first. I'm shooting my 360º spheres on a Gigapan robotic head and by pre-baking the bracketed stacks, I can also assign alpha channels to eliminate the parts of the rig that get captured with my 8mm fisheye. This can all be f...
by mattmerk
Mon Mar 25, 2013 8:46 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

You can output stitched bracketed layers from both PTGui and AutoPano. The trouble is, most HDR programs will not handle very large panoramas to bring the separate 8 or 16-bit exposures into a 32-bit HDR file. For the time being I gave up on 32-bit panoramas, and I've often been tonemapping or fusi...
by mattmerk
Mon Mar 25, 2013 8:22 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Thanks for the reply. Here is a summary of my experience: I tried disabling all but one layer at a time, but got weird results. Layer 1 (N1) might be at a higher exposure and N2 might be at the bottom of the exposure range. And the rest were all over the place, seemingly randomly. It also appeared t...
by mattmerk
Mon Mar 25, 2013 4:57 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

I had a deep suspicion I was misunderstanding you and it turns out I was. Sory about that. I was totally unfamiliar with the term "autoblend" as regards Photoshop. I never really thought of using Photoshop for panorama stitching but now that you mention it, I can't think of a reason why not. So, her...
by mattmerk
Mon Mar 25, 2013 1:49 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

It is strange to me because APG seems to load the floating point images just fine. It just can't seem to output HDR.
by mattmerk
Mon Mar 25, 2013 12:05 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Aaron, in Hotoshop (CS6 for me) are you using the File/Automate/Merge to HDR PRO functionality? If you do that with bracketed images representing the brightest and darkest exposures, you should be getting 32 bit float results. I just uploaded a photoshop generated .exr file made from 10 brackets spa...
by mattmerk
Mon Mar 25, 2013 12:02 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

I had no problems making panoramas with Autopano Giga. That was easy. Took me the same 5 minutes to figure out as PTGUI and no need for the documentation either. My week with the documentation was in getting the HDR output to work, which now seems to NOT actually work. I had to exhaust every possibi...
by mattmerk
Sun Mar 24, 2013 11:39 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

So, I've sent emails and messages and heard nothing, no reply. Meanwhile, I downloaded PTGUI Pro and made a 13000 pixel wide HDRI panorama in about 5 minutes. Here are my immediate results. Lo and behold. Actual HDRI with white values well above 1. In the first image, I cropped out a small section o...
by mattmerk
Sun Mar 24, 2013 7:32 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

Here's just one example reason that one may want to preassemble their brackets into 32 bit photos: Maybe they are shooting on a gigapan head with an 8mm focal length lens that has such a wide FOV that it actually captures part of the robotic rig. By preassembling the brackets into 32 bit float they ...
by mattmerk
Sat Mar 23, 2013 12:48 am
 
Forum: Autopano - Bugs & discussion
Topic: 32 bit tiff read
Replies: 13
Views: 2483

I am rapidly coming to the conclusion that Autopano Gig does not actually do HDRI. Like I said, I have a decade of image based lighting experience in feature films and the HDRI output of Autopano Giga is NOT actually HDRI. If the values above 1.0 (in floating point) clip at white and there is no det...
by mattmerk
Fri Mar 22, 2013 8:21 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752

(...like loading a JPEG and saving it out as a .hdr file. You don't actually increase any information in the 8 bit LDR JPEG just by saving it as a 32 bit file. Hence 8 oz. to 50 gallon drum metaphor. Just to be clear.)
by mattmerk
Thu Mar 21, 2013 7:44 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Stitching multiple exposures, HDRI result
Replies: 71
Views: 11752
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